Burner.



No. 785,236. APATENrED MAR. 21, 1905*.

W. SMETHURST.

BURNER.

APPLIOATION FILED Nov. 1s, 1904.

FIGJ. v F|G.2.

n Maw mmmfz UNITED y STATES Patented March 21, 1905.

PATENT OFFICE.

WILLIAM SMETHURST, OF DOLGELLY, ENGLAND, ASSIGNOR TO THE SMETHURST FURNAGE & ORE TREATMENT SYNDICATE LIMITED,

BURNER.

SPECIFICATION forming part of Letters Patent No. 785,236, dated .March 21, 1905.

y Application filed November 18, 1904.-. Serial No. 233,341.

To /r/ZZ Awhom 7215 may concern,.-

Be it known that I, WILLIAM SMETHURs'r, a subject of the King of Great Britain and Ireland, residing at Dolgelly, England, have invented new and useful Improvements in BurnersforBurningUnderVVater or other Liquids, of which the following is a specification.

This invention relates to that type oi'l burner in which intimate mixtures of combustible and combustion-supporting gases are adapted to be burned submerged under water or other liquids, and has for its object the prevention ot' the firing back of the combustible mixture within the supply tubes or chambers and the effective circulation of the submerging water or liquid about or through the nozzle of the burner, so as to prevent back shocks of the liquid against the gas-nipples and the deposit of crystals or fur within the nozzle of the burner or upon the nipples of the gas-burners.

The type of burner employed is a movable burner connected by flexible piping to a supply of carefully proportioned and mixed gases 'which are adapted to completely combine and burn when submerged under water or liquid,

the movable burner being thus adapted to be inserted within a tank or other receptacle of liquid to effect the evaporation ot the same.

The improvement consists, in the {irst place, of the provision in the upper part of the neck of the burner of a series ot' nests of tubes, reducing in diameter from the burner toward the gas-supply, and through which nests of tubes the gas passes in succession toward the nozzle of the burner. This arrangement is to insure the prevention of the gas ring back toward the source of supply. The said tubes may have al series of layers of gauze withinthem to aid their efficiency, and the apertures of all the tubes toward the burner are coned or reduced in diameter.

The improvement, in the second place, consists in introducing the liquid or water in which the burner is submerged toward the Haine of the burner by induction, somewhat after the fashion of an injector, in order that the liquid evaporated into steam by contact with the flame of the burner may continually and quickl;T pass away from the burner with the gases of combustion and steam and a fresh supply of liquid may be continually induced to follow such flow by suitable induction-inlets at or about the rear oi' the burner-nozzle. This prevents coniiict between the outgoing products of combustion and steam and the iniowing Jfresh supply of liquid, thus preventing return shock, tending to back tiring, and, further, by the scouring action of the circulation through the burner, always in an outward direction, preventing the deposit of crystals or fur and the resultingl caking up of the burner. As a convenient mode of effecting such induced circulation through the burner outward an adjustable ind uction-cone is provided below the gas-nipples of the burner, and behind such induction-cone the liquid from the surrounding tank is induced through a suitable number oi' downwardly-bent tubes, which must extend below the bottom edge of the bellmouth attached to the burner. This downward extension of the circulating-supply tubes is necessary to prevent the rush of the flames and steam from seeking an outlet bysuch liquid-supply tubes, which otherwise might be the case. The effect of the arrangement as described is a vigorous and constant circulation of the submerging liquid through the bell-mouth of the burner always in the same direction, preventing return shocks,with tendency to back-tire, and preventing all deposit of fur or crystals upon the operative parts of the burner, while at the same time its evaporative efficiency is increased.

It is obvious that this submerged burner is eminently adapted for the economical evaporation of water, however liable to fur, and particularly of chemical solutions from which crystals may be deposited as a result of the evaporation.

In order that this invention may be the better understood, I will now proceed to describe the same with reference to the drawings hereto annexed and to/the letters marked thereon.

Figure 1 is an outside elevation of my improved burner. Fig. 2 is a vertical section through the same. Fig. 3 is a transverse section on X X, and Fig. 4 is a transverse section on Y Y.

The supply of inflammable mixture is supplied to the burner by divided pipes A A, which are of small diameter as compared with successively -increasing areas of successive pipes and the burner-tubes. Where the inlet-pipes A A are one inch in diameter, it increases at B to one and one-fourth inches in diameter. This is increased at the uniting pipe C to two inches in diameter, with further increases in the burner-pipes to three inches at D and four inches at E, respectively. The burner-pipe D is illed with tubes F of an internal diameter of not more than one-half an inch and of about three feet in length. The next ensuing burner-pipe E is filled with tubes G of one inch internal diameter, in which are placed short pieces of tube H of smaller diameter, between each of which is a transverse sheet of gauze K of about thirty meshes to the inch. The lower ends of the tubes G are coned or bent inward to contract the flame and increase its velocity past the mouths ot' the side induction-pipes L. The mouths of these tubes G are also protected by gauze K. It is found that the above relative dimensions are of importance, particularly the small diameter of the tubes F, and their length are of importance to prevent the tiring back of the iniiammable mixture.

Around the orifices of the tubes G is arranged a cone M, which is adjustable vertically by screw-threads'in the interior of the pipe E or in other convenient way. This cone further concentrating the issuing flame which begins to burn at the orifices of the tubes G forms an induction-nozzle past the side induction-pipes L, through which is thereby induced a low of the surrounding water or liquid toward the issuing Hame. The liquid is thus brought into intimate contact with the llame just at its nascent point of combustion, and the combined llame and liquid issues downward in a forcible stream through the expanding trumpet-mouth N, the said trumpet-mouth being provided with apertures P about the lower rim for the lateral spread of the boiling liquid. rIhe side induction-pipes L must have their lower orifices L brought down below the level of the trumpet edge to insure a perfeet circulation, and these lower orilices L may be adjustable as to depth, as shown, or in any convenient manner. The circulation of the boiling liquid thus set up in the trumpet-orice of the burner always in the same direction, following and induced by the issuing llame, prevents any return shocks of liquid against the burner with tendency to back-lire, and, further, prevents all deposit of fur or crystals upon the operative parts of the burner, while at the same time the constant regular circulation of colder liquid toward the flame increases the evaporative eiiiciency of the burner.

Having now described my invention, what I claim, and desire to secure by Letters Patent, is-

1. An iniiammable gas-burner having its incasing pipes gradually enlarged from a minimum lat the inlet to a maximum at the outlet and .having within such incasing pipes a double series of nests of metallic tubes, ot' which the first series are of considerable num ber and length, and of a fractional diameter to the gas-inlet, and the second series shorter and of larger diameter than the first, containing within them sectional smaller tubes with transverse diaphragms of gauze to prevent backiring, substantially as described.

2. In a device of the class described, atrumpet-shaped extension, having lateral inlets, issuing-nozzles having contracted ends opening into said extension and an inwardly-coned shield about said nozzles, said shield being adjustable as to position relatively to the said inlets, substantially as described.

3. In a burner, the combination with atrumpet-shaped extension of the burner, of lateral pipe-inlets from the surrounding liquid such pipe-inlets being inserted in the throat of the trumpet shaped extension and being bent over, so that their lower mouths are situated below the edge of the trumpet-shaped extension, to determine a more effective circulation ofthe submerging liquid through the said trumpet-shaped extension of the burner, substantially as described.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM SMETHURST.

Witnesses: i

GEORGE SAMUEL NEsBI'r'r HULL, ARTHUR HOWARD DAvIEs. 

